<template>
    <div class="app-container">
        讲师列表
        <el-card class="operate-container" shadow="never">
            <el-form :inline="true" class="demo-form-inline">
                <el-form-item label="名称">
                    <el-input v-model="searchObj.name" placeholder="讲师名" />
                </el-form-item>

                <el-form-item label="头衔">
                    <el-select v-model="searchObj.level" clearable placeholder="头衔">
                        <el-option value="1" label="高级讲师" />
                        <el-option value="0" label="首席讲师" />
                    </el-select>
                </el-form-item>

                <el-form-item label="入驻时间">
                    <el-date-picker v-model="searchObj.joinDateBegin" placeholder="开始时间" value-format="yyyy-MM-dd" />
                </el-form-item>
                <el-form-item label="-">
                    <el-date-picker v-model="searchObj.joinDateEnd" placeholder="结束时间" value-format="yyyy-MM-dd" />
                </el-form-item>

                <el-button type="primary" icon="el-icon-search" @click="fetchData()">查询</el-button>
                <el-button type="default" @click="resetData()">清空</el-button>
            </el-form>
        </el-card>
        <el-card class="operate-container" shadow="never">
            <i class="el-icon-tickets" style="margin-top: 5px"></i>
            <span style="margin-top: 5px">数据列表</span>
            <el-button class="btn-add" @click="add()" style="margin-left: 10px;">添加</el-button>
            <el-button class="btn-add" @click="batchRemove()">批量删除</el-button>
        </el-card>
        <el-table :data="list" border stripe @selection-change="handleSelectionChange">
            <!-- <el-table :data="list" border stripe> -->
            <el-table-column type="selection" />
            <el-table-column label="#" width="50">
                <template slot-scope="scope">
                    {{ (page - 1) * limit + scope.$index + 1 }}
                </template>
            </el-table-column>
            <el-table-column prop="name" label="名称" width="80" />
            <el-table-column label="头衔" width="90">
                <template slot-scope="scope">
                    <el-tag v-if="scope.row.level === 1" type="success" size="mini">高级讲师</el-tag>
                    <el-tag v-if="scope.row.level === 2" size="mini">首席讲师</el-tag>
                </template>
            </el-table-column>
            <el-table-column prop="intro" label="简介" />
            <el-table-column prop="sort" label="排序" width="60" />
            <el-table-column prop="joinDate" label="入驻时间" width="160" />
            <el-table-column label="操作" width="200" align="center">
                <template slot-scope="scope">
                    <el-button type="text" size="mini" @click="removeById(scope.row.id)">删除</el-button>
                    <router-link :to="'/vod/teacher/edit/' + scope.row.id">
                        <el-button type="text" size="mini">修改</el-button>
                    </router-link>
                </template>
            </el-table-column>
        </el-table>
        <el-pagination :current-page="page" :total="total" :page-size="limit" :page-sizes="[5, 10, 20, 30, 40, 50, 100]"
            style="padding: 30px 0; text-align: center;" layout="total, sizes, prev, pager, next, jumper"
            @size-change="changePageSize" @current-change="changeCurrentPage" />
    </div>
</template>

<script>

import { pageList, removeTeacherId, batchRemove } from '@/api/vod/teacher'
export default {
    data() {
        return {
            list: [],//讲师列表
            total: 0,//总记录数
            page: 1,//页码
            limit: 10,//每页记录数
            searchObj: {},//查询条件
            multipleSelection: []//批量删除选中的记录列表
        }
    },
    created() {
        this.fetchData();
    },
    methods: {
        fetchData() {
            pageList(this.page, this.limit, this.searchObj).then(response => {

                this.list = response.data.records
                this.total = response.data.total
            })

        },
        changePageSize(size) {
            this.limit = size
            this.fetchData()
        },
        changeCurrentPage(page) {
            this.page = page
            this.fetchData()
        },
        resetData() {
            this.searchObj = {}
            this.fetchData()
        },
        removeById(id) {
            this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {
                return removeTeacherId(id)
            }).then((response) => {
                this.fetchData()
                this.$message.success(response.message)
            })
        },
        add(){
            this.$router.push({path:'/vod/teacher/create'})
        },
        batchRemove() {
            if (this.multipleSelection.length === 0) {
                this.$message.warning('请选择要删除的记录！')
                return
            }
            this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {
                // 点击确定，远程调用ajax
                // 遍历selection，将id取出放入id列表
                var idList = []
                this.multipleSelection.forEach(item => {
                    idList.push(item.id)
                })
                // 调用api
                return batchRemove(idList)
            }).then((response) => {
                this.fetchData()
                this.$message.success(response.message)
            }).catch(error => {
                if (error === 'cancel') {
                    this.$message.info('取消删除')
                }
            })
        },
        // 当多选选项发生变化的时候调用
        handleSelectionChange(selection) {
            this.multipleSelection = selection
        },
    }
}
</script>